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Showing posts with the label Science

Designing a motorjet in CAD

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  In the realm of engineering, particularly in aerospace and energy sectors, the design of combustion systems holds paramount importance. Annular combustors, a crucial component of gas turbine engines, play a vital role in efficiently converting fuel into energy. Designing these complex structures requires meticulous attention to detail and sophisticated modeling techniques. Understanding Annular Combustors: Before diving into the design process, it's essential to grasp the fundamentals of annular combustors. These combustion chambers feature a ring-like shape, encasing the turbine section of a gas turbine engine. They are responsible for mixing fuel with air and igniting the mixture to generate high-temperature gases that drive the turbine blades. The design of annular combustors must ensure efficient combustion, minimal emissions, and structural integrity under extreme operating conditions. Designing: First, a ring with an inner and outer diameter must be modelled. The inner ring

Making a desktop blowtorch-powered furnace for less than £10

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A furnace or foundry is simply an enclosed, highly insulated container than is used to heat materials. This furnace will use a super-material known as Starlite, which can effectively insulate temperatures of up to 10,000C for minutes on end. This material can be placed on your hand, and will remain cool with a blowtorch aimed on the other side. The material works by creating a carbon foam on its surface. Carbon is so heat resistant that it scientifically cannot melt, so it is the perfect insulator in a foam form. This foam can be made by heating a specific mix that creates carbon dioxide when heated.  The first part of this project will be like baking, but each of the ingredients is vital to create the desired carbon foam. To make Starlite, combine 2 parts of flour, 1 part corn starch, 1 part baking powder and 1 part sugar in a bowl.  TO make the furnace below, make enough to cover the inside of the can and its lid. I used 250g of putty (80g of flour, 40g others, 50g water) Then slowly

Making a High Voltage Generator which runs off a 9V battery

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 This device is easily capable on sending hot arcs over 1cm, and is completely wireless. It runs on a normal 9V battery and is incredibly reliable, and waterproof. This post will show you the methods of making it. To begin, you will need to heart of the system - a module that converts the 9v into a high voltage, low current output. The  High Voltage Generator (HVG)  can be bought from Amazon, thus saving the need for any complicated electronics. The next item that's needed is a switch, or in my case, two switches. I used a toggle switch to arm the device for safety, and a press switch to momentarily send power to the HVG. Finally, as a personal touch, I used a  9v to wire adaptor  to make battery changes easier - but this is purely optional. To begin the build, you want to wire everything together. I like to use wire connector blocks , as they insulate all the connections. Below is the diagram, and below that is the schematic. In real life, this wiring looks like this: Then use a

Making a pulsejet that runs on any aerosol

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Firstly, I used an open tin can for the combustion chamber. The tin can was cleaned thoroughly before use, and allowed to dry. Then two metal tubes were used as an exhaust and inlet. The larger tube, with an approximate diameter of 3.7cm, will act as the exhaust pipe. The smaller tube, with a diameter of 1.9cm will act as an inlet.  Next a fuel system must be made. Below is the plan I used to convert 1/4' flexible tubing to 8mm copper pipe. My only supplier of plumbing parts is Screwfix and I could not find a straight adaptor, so multiple adaptors were used to convert the tubing to 8mm, and to accommodate a ball valve. Below is the plan in real life, made with the parts listed above. Next, it is important to crimp the end of the 8mm pipe. This allows for a faster velocity of the fuel entering the combustion chamber. Faster gases have lower pressure, so the Bernoulli effect is amplified. The faster gas effectively sucks in more air, allowing the pulsejet to run more efficiently.  Fo

Making an oil siphoned rocket-based burner

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This essay explores the concept of using siphoning as a fuel pump system, examining its efficiency, practicality, and potential benefits. Below is the initial sketch for the burner. Fuel, in this case vegetable oil, is stored in a reservoir. It is then siphoned down a tube into an atomiser, which is then held in front of a stream of low speed, high pressure air. This mixes thoroughly with he oxygen and makes a mixture suitable for combustion. This is then lit by hot gases expelled from the mouth of the rocket, and then exits, creating thrust and massive amounts of heat. The Siphoning Principle Siphoning is a natural phenomenon that occurs when a liquid flows between two containers at different elevations due to the force of gravity. It involves a tube through which the liquid moves, creating a vacuum that draws the liquid upward and overcomes the force of gravity. In the context of fuel burners, this principle can be harnessed to transport fuel from a storage tank to the burner unit wi

Superheated Steam

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Introduction: The interaction between superheated steam and a match may seem counterintuitive at first glance, as steam is commonly associated with extinguishing flames rather than igniting them. However, under specific conditions, superheated steam can indeed light a match, revealing a fascinating aspect of thermodynamics and combustion. This essay explores the science behind this phenomenon, examining the critical factors that contribute to the ignition of a match by superheated steam. The Role of Temperature: The key factor in understanding how superheated steam can light a match lies in its elevated temperature. When steam is superheated to sufficiently high temperatures, it becomes an effective heat transfer medium. The intense heat carried by the superheated steam can lead to a rapid increase in the temperature of nearby objects, including combustible materials like a matchstick. Thermal Conductivity and Heat Transfer: Superheated steam has a higher thermal conductivity than air,

Archimede's Principle

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 Archimedes Principle   Archimedes’ principle is a fundamental law of physics that governs the behavior of fluids. It states that the upward buoyant force exerted on an object immersed in a fluid is equal to the weight of the fluid displaced by the object. This principle has significant applications in various fields, such as shipbuilding, aeronautics, and engineering. In this blog post, we will explore the origins of Archimedes’ principle and its significance in modern times. Archimedes was an ancient Greek mathematician, physicist, and inventor. He is widely regarded as one of the most influential scientists of all time, and his works had a profound impact on the development of mathematics and physics. One of his most famous contributions to science is his principle of buoyancy. The story of how Archimedes discovered the principle of buoyancy is a fascinating one. A King asked Archimedes to determine if his new crown was made of pure gold or if it had been adulterated with cheaper me

Making a cannon with a water bottle and lighter

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A cannon is essentially a bomb with a hole in it. If you place a projectile in front of the hole, it will be ejected out incredibly fast, as the combustion creates high pressure behind the bullet.   A simple pea shooter relies on the pressure from your mouth to push a pea down a barrel. A pressure gradient diagram illustrates this through colour - the closer you are to red, the higher the pressure: There is a high pressure behind the barrel, and as the pea moves down the barrel, pressure is relieved. The only reason the pea has a reason to move is the universes tendency to want equilibrium.  As there is a pressure difference between your mouth and the surrounding air, the pea will do whatever it takes to maintain an equilibrium of pressure, even if that means shooting out at high speeds. Here, the energy transfer is pressure energy (PV) to kinetic energy (J).  Here is another pressure gradient diagram of a gun I have made, which fires marbles at close to supersonic speeds - all from a